{\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}\begin{tabular}{l*{1}{cccc}}\hline \hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Birth weight (grams)}&\multicolumn{1}{c}{Gestation length (weeks)}&\multicolumn{1}{c}{Very low birth (weight<1,500g)}&\multicolumn{1}{c}{Very preterm birth (weeks<32)}\\
 \hline \\ [-1.8ex] & \multicolumn{4}{c}{Panel a)} \\
Pollution in w-4 weeks&    -0.65222** &    -0.00107   &     0.00015***&     0.00017***\\
                    &   (0.33019)   &   (0.00114)   &   (0.00005)   &   (0.00005)   \\
[1em]
Observations        &       61342   &       61342   &       61342   &       61342   \\
 

 \hline \\ [-1.8ex] & \multicolumn{4}{c}{Panel b)} \\
Pollution in w-8 weeks&    -1.47644***&    -0.00286** &     0.00026***&     0.00029***\\
                    &   (0.42488)   &   (0.00146)   &   (0.00007)   &   (0.00007)   \\
[1em]
Observations        &       47804   &       47804   &       47804   &       47804   \\
 

 \hline \\ [-1.8ex] & \multicolumn{4}{c}{Panel c)} \\
Pollution in w-12 weeks&    -1.23169** &    -0.00347*  &     0.00023***&     0.00026***\\
                    &   (0.57248)   &   (0.00196)   &   (0.00009)   &   (0.00009)   \\
[1em]
Observations        &      36,863   &      36,863   &      36,863   &      36,863   \\
Mean Dep. Variable  &   3,218.673   &      39.029   &       0.004   &       0.004   \\
R-squared           &       0.214   &       0.221   &       0.174   &       0.180   \\
Year FE             &         Yes   &         Yes   &         Yes   &         Yes   \\
Locality FE         &         Yes   &         Yes   &         Yes   &         Yes   \\
Cluster level       &    Locality   &    Locality   &    Locality   &    Locality   \\
\hline \hline \end{tabular}}
